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Estimating the Rayleigh‐wave impulse response between seismic stations with the cross terms of the Green tensor
Author(s) -
van Wijk Kasper,
Mikesell T. Dylan,
SchultePelkum Vera,
Stachnik Josh
Publication year - 2011
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2011gl047442
Subject(s) - geology , seismology , impulse response , impulse (physics) , rayleigh wave , geophysics , geodesy , surface wave , mathematical analysis , physics , mathematics , classical mechanics , optics
The development of ambient noise tomography has provided a powerful tool to investigate the Earth's subsurface with increased resolution. Most commonly, surface‐wave tomography is performed on inter‐station estimates of the vertical component of Rayleigh waves, stemming from crosscorrelations of ocean‐generated noise. Here, we estimate the cross terms of the Rayleigh‐wave Green tensor, and show this is less sensitive to signal not in‐line with the seismic stations. We illustrate this result with the Batholiths temporary seismic deployment, showing estimates of the Rayleigh wave with a higher signal‐to‐noise ratio and a consequently better phase‐velocity dispersion curve. This approach provides an opportunity for reliable ambient noise crosscorrelations over shorter time windows and more closely spaced stations in the future.